scsi: gdth: remove direct serial port access

#ifdef DEBUG_GDTH

static u8   DebugState = DEBUG_GDTH;

#ifdef __SERIAL__

#define MAX_SERBUF 160

static void ser_init(void);

static void ser_puts(char *str);

static void ser_putc(char c);

static int  ser_printk(const char *fmt, ...);

static char strbuf[MAX_SERBUF+1];

#ifdef __COM2__

#define COM_BASE 0x2f8

#else

#define COM_BASE 0x3f8

#endif

static void ser_init()

{

    unsigned port=COM_BASE;

    outb(0x80,port+3);

    outb(0,port+1);

    /* 19200 Baud, if 9600: outb(12,port) */

    outb(6, port);

    outb(3,port+3);

    outb(0,port+1);

    /*

    ser_putc('I');

    ser_putc(' ');

    */

}

static void ser_puts(char *str)

{

    char *ptr;

    ser_init();

    for (ptr=str;*ptr;++ptr)

        ser_putc(*ptr);

}

static void ser_putc(char c)

{

    unsigned port=COM_BASE;

    while ((inb(port+5) & 0x20)==0);

    outb(c,port);

    if (c==0x0a)

    {

        while ((inb(port+5) & 0x20)==0);

        outb(0x0d,port);

    }

}

static int ser_printk(const char *fmt, ...)

{

    va_list args;

    int i;

    va_start(args,fmt);

    i = vsprintf(strbuf,fmt,args);

    ser_puts(strbuf);

    va_end(args);

    return i;

}

#define TRACE(a)    {if (DebugState==1) {ser_printk a;}}

#define TRACE2(a)   {if (DebugState==1 || DebugState==2) {ser_printk a;}}

#define TRACE3(a)   {if (DebugState!=0) {ser_printk a;}}

#else /* !__SERIAL__ */

#define TRACE(a)    {if (DebugState==1) {printk a;}}

#define TRACE2(a)   {if (DebugState==1 || DebugState==2) {printk a;}}

#define TRACE3(a)   {if (DebugState!=0) {printk a;}}

#endif

#else /* !DEBUG */

#define TRACE(a)

#define TRACE2(a)